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Octal to ASCII Converter
Convert octal values to ASCII text in your browser with explicit ASCII, Unicode code point, and UTF-8 byte handling.
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Convert octal values to ASCII text
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Choose the exact representation you need; the tool does not guess an encoding.
Detailed conversion guide
How Octal to ASCII Conversion Works
Every octal token uses only digits 0 through 7. The converter parses each value in base 8, checks the selected range, and maps it to text. Octal 110 is decimal 72, which is uppercase H.
Separated tokens may contain one to three digits. Compact input must use exactly three digits per group so that the byte boundary stays unambiguous.
| Input | Output | Meaning |
|---|---|---|
101 | 65 | A |
040 | 32 | space |
177 | 127 | DEL |
303 251 | 195 169 | é in UTF-8 |
Octal to ASCII in JavaScript and Python
Use parseInt(token, 8) in JavaScript or int(token, 8) in Python, then validate before converting the number to a character. UTF-8 byte sequences must be decoded as a whole.
// validate first, then convert
const value = Number.parseInt(token, radix);
if (!Number.isInteger(value)) throw new Error("Invalid input");Valid Octal, ASCII Range, and UTF-8
Strict ASCII accepts octal 000 through 177. UTF-8 byte mode accepts 000 through 377 and then validates the resulting byte sequence.
Digits 8 and 9 are invalid in octal. Out-of-range input and incomplete compact groups produce a visible warning instead of partial output.
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